Color-converting substrate and display device including the same

Abstract

A color-converting substrate includes a color-converting part including a wavelength-converting particle configured to change a wavelength of an incident light to emit a light having a color different from the incident light, a color filter pattern filtering the light emitted from the color-converting part, and a light-reflective layer disposed between the color-converting part and the color filter pattern to selectively reflect a light having a wavelength same as the wavelength of the incident light.

What is claimed is: 
     
       1. A display device comprising:
 a color-converting part including a wavelength-converting particle configured to change a wavelength of an incident light to emit a light having a color different from the incident light; 
 a low refractive layer disposed on the color-converting part and having a refractive index smaller than a refractive index of the color-converting part; 
 a color filter pattern filtering the light emitted from the color-converting part; and 
 a light-reflective layer disposed between the color-converting part and the color filter pattern to selectively reflect a light having a wavelength same as the wavelength of the incident light. 
 
     
     
       2. The display device of  claim 1 , wherein the light-reflective layer covers a light-exiting surface and a side surface of the color-converting part. 
     
     
       3. The display device of  claim 1 , wherein the light-reflective layer has a stacked structure including a plurality of layers having different refractive indexes. 
     
     
       4. The display device of  claim 1 , wherein the light-reflective layer includes a wire-grid pattern. 
     
     
       5. The display device of  claim 1 , wherein the light-reflective layer includes a nano-particle including silver. 
     
     
       6. The display device of  claim 5 , wherein the nano-particle includes an oxide core and a metal shell including silver. 
     
     
       7. The display device of  claim 1 , further comprising a compensation part configured to transmit an incident light without changing a wavelength of the incident light, wherein the compensation part does not overlap the light-reflective layer. 
     
     
       8. The display device of  claim 7 , wherein the incident light is a blue light. 
     
     
       9. The display device of  claim 1 , wherein the wavelength-converting particle includes a quantum dot. 
     
     
       10. The display device of  claim 1 , wherein the color-converting part further includes a scattering particle. 
     
     
       11. The display device of  claim 1 , wherein the refractive index of the low refractive layer is equal to or less than 1.3. 
     
     
       12. The display device of  claim 1 , wherein the low refractive layer includes a hollow particle dispersed in a resin matrix. 
     
     
       13. The display device of  claim 1 , wherein the low refractive layer is disposed between the light-reflective layer and the color filter pattern. 
     
     
       14. The display device of  claim 1 , further comprising a compensation part configured to transmit an incident light without changing a wavelength of the incident light, wherein the compensation part does not overlap the light-reflective layer,
 wherein the low refractive layer contacts the compensation part. 
 
     
     
       15. The display device of  claim 1 , wherein a portion of the low refractive layer is disposed between color-converting parts adjacent to each other. 
     
     
       16. The display device of  claim 1 , further comprising a partition wall including openings in which the color-converting part is provided,
 wherein the low refractive layer is disposed on the partition wall. 
 
     
     
       17. The display device of  claim 1 , further comprising an array of pixels. 
     
     
       18. The display device of  claim 17 , further comprising an encapsulation layer covering the array of pixels. 
     
     
       19. The display device of  claim 17 , wherein the pixels each includes a light-emitting element. 
     
     
       20. The display device of  claim 17 , further comprising a light-blocking matrix disposed on the low refractive layer.